Long-range synchronization of nonlinear dynamics in a large 1D-array of blue semiconductor lasers with filtered optical feedback

Synchronization of nonlinear dynamics is a concept that is widely encountered in nature and it has been thoroughly explored in domains as varied as biology or mechanical clocks. In the context of lasers subject to optical feedback, most of the studies focus on systems with a limited number of emitters. Our experimental work demonstrates extended synchronization in a large array of blue semiconductor lasers subject to filtered optical feedback. The long-range synchronization among the 12 chaotic emitters in the array is confirmed by temporal correlations in the time series and by frequency locking in the optical spectra of individual lasers.